<!--/**
* 添加商品界面*
*
* @author LWG
* @date 2022/9/7 15:54
* @since 1.0.0
*/-->

<template>
    <div>
      <!-- 面包屑导航区 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <!-- 卡片视图 -->
      <el-card>
        <!-- 提示 -->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <!-- 步骤 -->
        <el-steps :space="200" :active="Number(activeIndex)" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab栏区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top">
          <el-tabs v-model="activeIndex" tab-position="left" :before-leave="beforeTagLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_name">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_name">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader v-model="addForm.goods_cat" :options="cateList" 
                  :props="cateProps"
                  expand-trigger="hover"
                  @change="handleChange" change-on-select clearable>
                </el-cascader>
              </el-form-item>
              
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <!-- 渲染的Item项 -->
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                <!-- 复选框 -->
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox (property) border :label="cv" v-for="(cv,i) in item.attr_vals" :key="i"></el-checkbox id="goods-params">
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <!-- action为图片要上传的地址 -->
              <el-upload
                :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
                list-type="picture" :headers="headersObj" :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <!-- 富文本编辑器 -->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary" class="btnAdd" @click="add">主要按钮</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
      <!-- 预览对话框 -->
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
        <img :src="previewPath" class="previewImg">
      </el-dialog>
    </div>
  </template>
  
  <script>
    import _ from 'lodash';
  
    export default {
      name:'Add',
      data(){
        return{
          // 步骤条的当前索引
          activeIndex: 0,
          // 表单
          addForm: {
            goods_name: '',
            goods_price: 0,
            goods_weight: 0,
            goods_number: 0,
            // 商品所属的分类数组
            goods_cat: [],
            // 图片的数组
            pics:[],
            // 商品详情描述
            goods_introduce: '',
            attrs: []
          },
          // 表单的验证规则对象
          addFormRules: {
            goods_name: [
              {required: true, message: '请输入商品名称', trigger:'blur'}
            ],
            goods_price: [
              {required: true, message: '请输入商品价格', trigger:'blur'}
            ],
            goods_weight: [
              {required: true, message: '请输入商品重量', trigger:'blur'}
            ],
            goods_number: [
              {required: true, message: '请输入商品数量', trigger: 'blur'}
            ],
            goods_cat: [
              {required: true, message: '请选择商品分类', trigger: 'blur'}
            ]
          },
          // 商品数据列表
          cateList: [],
          // 选择框中要渲染的数据
          cateProps: {
            label: 'cat_name',  //要展示的内容
            value: 'cat_id',    //选中的为内容id
            children: 'children'
          },
          // 动态参数列表数据
          manyTableData: [],
          // 静态属性列表数据
          onlyTableData: [],
          // 图片上传的URL地址
          uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
          // 图片的请求头
          headersObj:{
            Authorization: window.sessionStorage.getItem('token')
          },
          // 图片预览对话框是否显示
          previewVisible: false,
          // 预览图片的路径
          previewPath:''
        }
      },
      created(){
        this.getCateList();
      },
      methods:{
        async getCateList(){
          const {data: res} = await this.$http.get('categories');
          if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
          this.cateList = res.data;
        },
        // 级联选择器发生变化
        handleChange(){
          if(this.addForm.goods_cat.length !== 3){
            return this.addForm.goods_cat = [];
          }
          console.log(this.addForm.goods_cat);
        },
        // 离开tab时触发
        beforeTagLeave(newTab,oldTab) {
          if(oldTab === '0' && this.addForm.goods_cat.length !== 3){
            this.$message.error('请选择参数列表');
            return false;
          }
        },
        // tab栏被点击时触发
        async tabClicked(){
          if(this.activeIndex === '1'){
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
              params: { sel: 'many'}
            });
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
            res.data.forEach(element => {
              element.attr_vals = element.attr_vals.length === 0 ? [] : element.attr_vals.split(' ');
            });
            this.manyTableData = res.data;
            console.log(res.data);
          }else if(this.activeIndex === '2'){
            const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
              params:{ sel: 'only'}
            });
            if(res.meta.status !== 200)return this.$message.error(res.meta.msg);
            this.onlyTableData = res.data;
          }
        },
        // 图片预览事件
        handlePreview(file){
          const previewPath = file.response.data.url;
          this.previewPath = previewPath;
          this.previewVisible = true;
          console.log(previewPath);
        },
        // 图片移除事件
        handleRemove(file){
          const filePath = file.response.data.tmp_path;   /* 获取要删除图片的路径(file为当前删除的图片对象) */
          const index = this.addForm.pics.findIndex(x => x.pic === filePath);   /* 筛选出要删除图片在数组中的索引 */
          this.addForm.pics.splice(index,1);   /* 利用splice方法把数组中的图片删除掉 */
        },
        // 监听图片上传成功的事件
        handleSuccess(response){
          const picInfo = {pic: response.data.tmp_path}
          this.addForm.pics.push(picInfo);
        },
        // 提交商品信息
        add(){
          this.$refs.addFormRef.validate(async valid => {
            if (!valid) {
              return this.$message.error('请填写必要的表单项！')
            }
            // 执行添加的业务逻辑
            // lodash   cloneDeep(obj)
            const form = _.cloneDeep(this.addForm)
            form.goods_cat = form.goods_cat.join(',')
            // 处理动态参数
            this.manyTableData.forEach(item => {
              const newInfo = {
                attr_id: item.attr_id,
                attr_value: item.attr_vals.join(' ')
              }
              this.addForm.attrs.push(newInfo)
            })
            // 处理静态属性
            this.onlyTableData.forEach(item => {
              const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
              this.addForm.attrs.push(newInfo)
            })
            form.attrs = this.addForm.attrs
            console.log(form);
  
            // 发起请求添加商品
            // 商品的名称，必须是唯一的
            const { data: res } = await this.$http.post('goods', form)
  
            if (res.meta.status !== 201) {
              return this.$message.error('添加商品失败！')
            }
  
            this.$message.success('添加商品成功！')
            this.$router.push('/goods')
          })
        }
  
      },
      computed:{
        // 计算分类二级id
        cateId(){
          if(this.addForm.goods_cat.length === 3){
            return this.addForm.goods_cat[2]
          }
          return null;
        }
      }
    }
  </script>
  
  <style lang="less" scoped>
    .el-checkbox-group > .el-checkbox {
      margin: 0 10px 0 0 !important;
    }
    .previewImg{
      width: 100%;
    }
    .btnAdd{
      margin-top: 15px;
    }
  </style>